Telephone-hook switch.



No. 732.287. PATENTED JUNE 30, 1903. E. B. FAHNESTOOK. TELEPHONE HOOK SWITCH. APPLICATION rnlnn 001225. 1902.

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UNIT D STATES Patented June 80, 1903.

PATENT OFFICE.

ERNEST B. FAHNESTOCK, OF NEW YORK, N. Y.

TELEPHONE-HOOK SW|TCH..

SPEGIFIGATION forming part of Letters Patent No. 732,287, dated June 30, 1903.

Application filed October 25, 1902. SerialNo.128,'/44. (No model.)

To all whom, it may concern.-

Be it known that LERNEsr B. FAHNESTOOK, a citizen of the United States, residing at New York city, county and State of New York, have invented certain new and useful Improvements in Telephone-Hook Switches, of which the following is a specification.

My invention relates to hook-switches of the type commonly employed with telephonic apparatus, such as is used at a subscribers station, and which has for its object to form a support for the receiving instrument and when influenced by the weight of such instrument to cut the transmitting and receiving instruments of the system out of circuit and the subscribers bell' and condenser, where a condenser is used,-into circuit.

The general purpose of my invention is to simplify and cheapen the construction of hook-switches, and, further, to make a switch which will be reliable in use.

The accompanying drawings will serve to illustrate my invention.

Figure 1 is a front view of a subscribers set with the box-cover down and showing the switch, receiver, and other parts in elevation. Fig. 2 is a diagram of the circuit connections. Fig. 3 is an enlarged elevation of the switch mechanism. Fig. 4 is a vertical section through the switch-plates and their support on the line X X of Fig. 3.

Referring to the drawings, A indicates any suitable supportsuch, for instance, as. the supporting-board of a subscribers set. Pro: jecting from the front of this board is a bracket B, and mounted upon this bracket are a series of springplates O D E F G, electrically separated by means of the insulating material I-I. Connected to the upper end of the plate E is a forked arm I, which forms the support for the receiver J. Arranged in the path of movement over and under the forked arm I are the limiting-pins K L. Connected to the lower side of the rear end of the forked arm I is a portion of insulating material M, which bears on the upper side of the plate F. In the diagram Fig. 2 it will be observed that theplates O, D, F, and G are respectively connected as follows: 0, through resistancecoil to main-line conductor T; D, through transmitter to main -line conductor S; F, through condenser to opposite main-line conductor S; G, through bell to opposite mainline conductor T, and that the spring-plate E, which supports the forked arm I, is connected through a conductor to the receiver and to the conductor leading from plate F. The particular arrangement of circuit shown in the diagram,however, is not essential and is merely used for the purpose of illustration.

Mounted upon the plates D, E, and F are the contact-buttons N.

The operation of my device is as follows: IVhen the forked arm I is in the position shown in Fig. 1, the plate F, under the influenceof'the arm I acting through the insulating-button M,is forced downward and brought into contact with the plate G through one of the contact-buttons N, thereby establishing a circuit through the condenser and bell, the pin L serving to limit the downward movement of the arm I. When the receiver is removed from the hook-arm I, the plate E, owingto its resiliency, moves upward to the position shown in Fig. 3 until brought in contact with the stop K, thereby pressing plates 0 and D together and the arm I in contact with the plate D through the contact-buttons N, thereby establishing circuits through the transmitter, resistance-coil, and receiver.

Having thus described my invention, I claim-- 1. In a telephone-hook switch, the combination of a support, a series of spring-plates mounted on said support and insulated from each other, and a supporting device for the receiver mounted on and carried by one of said plates.

2. In atelephone-hook switch, the combination of a support, a series of spring-plates mounted on said support and insulated from each other, and a holding device for the receiver consisting of a forked arm mounted phone mounted on and carried by one of said spring-plates 4. In atelephone-hook switch, the combination of a support, a series of parallel springplates mounted on said support and insulated from each other, and a support for the telephone mounted on and carried by the cenl trally-loeated spring-plate of the series.

5. In a telephone-hook switch, the combination of a support, a series of parallel springplates mounted in said support and insulated from each other, a support for the telephone mounted on and carried by the centrally-located spring-plate of the series, and a body of insulating material arranged under the rear end of said telephone-support and over one of said spring-plates.

6. In a telephone-hook switch, the combination of a support, a series of spring-plates mounted on said support and insulated from each other, a support for the telephone mounted 011 and carried by the centrally-located spring-plate of the series, a transmitter and receiver in the conductors leading from the spring-plates above the centrally-disposed spring-plate, and a bell in the conductors leadin g from the spring-plates below the centrallydisposed spring-plate.

7. In a telephone-hook switch, the combination of a support, aseries of spring-plates carried thereby, a supporting device for the telephone mounted on and carried by the centrally-disposed spring-plate, and devices eated above and below the centrally-disposed spring-plate which will be thrown into and out of circuit by the movement of the supporting-arm for the telephone.

8. In a telephone-hook switch, the combination of a support, a series of spring-plates mounted 011 said support and insulated from each other, a support for the telephone mounted on and carried by one of said plates, and means for limiting the upward and downward movement of the support.

9. Ina telephone-hook switch, the combination of a support, a horizontally-disposed spring having at its outer end a hook which is adapted to be moved vertically downward when carrying the telephone and vertically upward when free, and a device situated in the path of movement of said spring and energized by the movement of said spring to open and close circuits.

10. I11 a telephone-hook switch, the combination of a support, a resilient device connected at one end to said support and carrying at its outer end a supporting-hook for the telephone, which is adapted to be moved vertically in the arc of a circle in one direction by the resiliency of the spring, and in the other direction by the weight of the telephone.

In testimony whereof I affix my signature in the presence of two witnesses.

ERNEST ll. FAIINESTOCK.

Witnesses:

J. E. PEARSON, FRANK OCoNNoR. 

